Grip strength will be measured via hand held dynamometry. Participants will perform three trials using their dominant hand. The force of each grip will be recorded and averaged in pounds.

The ABC scale is a 16-item participant-reported measure of balance confidence while performing various activities. Participants rank their level of confidence from 0 (not at all confident) to 100 (completely confident); scores from each item are then averaged for one final score. The maximum score is 100%, indicating high balance confidence.

The PDQ-39 is a 39-item participant-reported questionnaire which assesses health-related quality of life across 8 domains (mobility, activities of daily living, emotional well-being, stigma, social support, cognition, communication, bodily discomfort). Participants respond to each item using a 5-point Likert scale from 0 (never) to 4 (always). Items in each domain are scored by expressing summed item scores as a percentage (ranging from 0 to 100%). Lower scores indicate better quality of life.

The Mini BESTest is a 14-item test that assesses Anticipatory balance, reactive postural control, sensory orientation and dynamic gait. Performance for each item is ranked on a 3-point ordinal scale (0,1, or 2) with a total possible score of 28 (indicating good balance).

Fast-paced walking speed will be measured via 10 meter walk test, which has individuals walk 10 meters with the middle 6 meters timed; three trial are performed and the average time is taken. Faster walking speeds indicate greater mobility with walking.

Walking speed will be measured via 10 meter walk test, which has individuals walk 10 meters with the middle 6 meters timed; three trial are performed and the average time is taken. Faster walking speeds indicate greater mobility with walking.

The Social Support for Exercise Scale contains 13 items and asks participants to rank frequency of supporting exercise behaviors amongst both family and friends on a 5-point Likert scale (1, none to 5, very often). Scores range from 13 to 65 with higher scores indicating greater social support for exercise.

The Self-Efficacy for Exercise Scale contains 9 items and asks participants to rank their confidence (0, not confident to 10, very confident) in their ability to exercise three times per week for 20 minutes in 9 different scenarios. Scores range from 0 to 90 with higher scores indicating greater exercise self-efficacy.

The 6 Minute Walk Test measures a participants ability to cover as much distance (measured in meters) as possible while walking for 6 minutes. Participants will walk along a pre-defined pathway for 6 minutes, resting as needed. The test is a measure of walking endurance with further distances indicating greater endurance.

Health related quality of life will be measured via Rand 36-item Health Survey. This 36 item survey asks participants about their health in several categories (physical functioning, role limitations due to physical health, role limitations due to emotional problems, energy/fatigue, emotional well-being, social functioning, pain and general health). Scores in each category are averaged and range from 0 to 100, with higher scores indicating better health-related quality of life.

The MDS-UPDRS measures disability as a result of Parkinson's and allows tracking for progression of the disease. The scale has four parts (1, mentation, behavior and mood, 2, activities of daily living, 3, motor examination, and 4, complications of therapy. Each parkinsonian sign or symptom is ranked on a 5-point Likert scale (ranging from 0 to 4) with higher scores indicating greater impairments. The minimum score on the entire scale is 0 and the maximum is 199.

Participants will rate their perceived level of change on a 15-point Likert Scale ranging from -7 (a very great deal less/worse to +7 (a very great deal more/better) with 0 representing no change. They will use this scale to answer 6 separate questions: 1) amount of physical activity performed in an average week, 2) ability to walk leisurely, 3) ability to walk fast, 4) ability to walk for a long period of time, 5) ability to stand up from a seated position, 6) ability to steady yourself and prevent a fall.

Participants report their perceived physical activity levels compared to people their own age using a 5-point Likert Scale ranging from "much more active" to "much less active".

Physical activity levels will be measured via thigh-worn accelerometer (activPAL). This small device will be worn on the less affected thigh (or right thigh for care partners) of participants with Parkinson's. The activPAL is able to detect acceleration and body position (i.e. sitting, standing, or lying). Through collecting acceleration data, different intensities of physical activity will be inferred (i.e light, moderate and vigorous intensity physical activity), with moderate-to-vigorous intensity physical activity being used as the primary outcome measure. At all time points, participants will wear the activPAL for 7 consecutive days. The activPAL will be waterproofed and will not need to be removed for activities such as bathing.

The number and percentage of participants who remain in the study through the final measurement point at 6 months.

The number of participants recruited will be reported as a percentage of total participants contacted for study participation.